Anna Konda Robot Spraying Water Video

The snake contains 20 water hydraulic motors that move the robotic joints — and a similar number of valves to control the water flow to each motor. Each module consists of two hydraulic motors and two valves. The outer layer is comprised of a strong steel skeleton containing the joint modules,which can rotate around two orthogonal axes. The joints are controlled by custom-built electronics.

SF writers love the robot snake concept; I've found a reference as early as 1946. Emmett McDowell referred to a mechanical mining worm in his short story Love Among the Robots.

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